Linux Red Hat 8 Administration Essentials Course Outline
Overview
The course of training is designed to provide students with the most important and frequently performed administrative operations for a Red Hat or CentOS system. The workshop will have students performing operations and executing commands on the system both throughout the course. Students will have the option of typing commands or cutting and pasting completed commands from the course materials if they would have difficulty tying in entire commands. All the commands, as well as the graphical user interface, GNOME 3 and applications such as Cockpit, that are used in the class run on either Red Hat Enterprise Linux 8 or CentOS 8. The installation is identical as well.
Audience Profile
This course is intended for IT professionals who do not have experience working with Red Hat Enterprise Linux 8 or a Centos 8, and who are looking for a single three day course that covers the basic administrative operations of the respective Linux systems.
Prerequisites
Previous experience with computer systems which may include the administration of a Windows system.
Course Outline
Installing the System
Obtaining the Red Hat Enterprise Linux or CentOS Installation Media
Installing Red Hat Enterprise Linux 8 or CentOS
Partitioning a Disk for System Installation
The Physical Installation
Final Configuration Steps
Installing Updates
A Guided Tour of the GNOME 3 Desktop
Installing the GNOME Desktop
An Overview of the GNOME 3 Desktop
Launching Activities
Managing Windows
Using Workspaces
Calendar and Notifications
Desktop Settings
An Overview of the Cockpit Web Interface
An Overview of Cockpit
Installing and Enabling Cockpit
Accessing Cockpit
System, Logs, Storage, Networking, Virtual Machines, Accounts
Services, Applications, Diagnostic Reports, Kernel Dump
SELinux, Software Updates, Subscriptions, Terminal
Connecting to Multiple Servers
Enabling Persistent Metrics
Using the Bash Shell
What is a Shell?
Gaining Access to the Shell
Entering Commands at the Prompt
Getting Information about a Command
Bash Command-line Editing
Working with the Shell History
Filename Shorthand
Filename and Path Completion
Input and Output Redirection
Working with Pipes in the Bash Shell
Configuring Aliases
Environment Variables
Writing Shell Scripts
Managing Users and Groups
User Management from the Command-line
User Management with Cockpit
Adding a New Disk Drive to a System
Mounted File Systems or Logical Volumes
Finding the New Hard Drive
Creating Linux Partitions
Creating a File System on a Disk Partition
An Overview of Journaled File Systems
Mounting a File System
Configuring to Automatically Mount a File System
Adding a Disk Using Cockpit
Understanding Software Installation and Management Repositories
The BaseOS Repository
The AppStream Repository
Configuring systemd Units
Understanding systemd Targets
Understanding systemd Services
systemd Target Descriptions
Identifying and Configuring the Default Target
Understanding systemd Units and Unit Types
Dynamically Changing the Current Target
Enabling, Disabling and Masking systemd Units
Working with systemd Units in Cockpit
Network Management
An Introduction to NetworkManager
Installing and Enabling NetworkManager
Basic nmcli Commands
Working with Connection Profiles
Interactive Editing
Configuring NetworkManager Permissions
Basic Firewall Configuration with firewalld
An Introduction to firewalld
Zones
Interfaces
Services
Ports
Checking firewalld Status
Configuring Firewall Rules with firewall-cmd
Identifying and Changing the Default Zone
Displaying Zone Information
Adding and Removing Zone Services
Working with Port-based Rules
Creating a New Zone
Changing Zone/Interface Assignments
Masquerading
Adding ICMP Rules
Implementing Port Forwarding
Managing firewalld from the Cockpit Interface
Managing firewalld using firewall-config
Configuring SSH Key-based Authentication
An Overview of Secure Shell (SSH)
SSH Key-based Authentication
Setting Up Key-based Authentication
SSH Key-based Authentication from Linux and macOS Clients
Managing Multiple Keys
SSH Key-based Authentication from Windows 10 Clients
SSH Key-based Authentication using PuTTY
Generating a Private Key with PuTTYgen
Installing the Public Key for a Google Cloud Instance
Remote Desktop Access with VNC
Secure and Insecure Remote Desktop Access
Installing the GNOME Desktop Environment
Installing VNC
Configuring the VNC Service using the Configurator
How the VNC Configurator Script Works
Connecting to a VNC Server
Establishing a Secure Remote Desktop Session
Establishing a Secure Tunnel on Windows using PuTTY
Shutting Down a Desktop Session
Troubleshooting a VNC Connection
Using NFS to Share Files with Remote Systems
Ensuring NFS Services are running
Configuring the Firewall to Allow NFS Traffic
Specifying the Folders to be Shared
Accessing Shared Folders
Mounting an NFS Filesystem on System Startup
Unmounting an NFS Mount Point
Accessing NFS Filesystems in Cockpit
Sharing Files with a Windows Systems using Samba
Samba and Samba Client
Installing a Samba System
Configuring the Firewall to Enable Samba
Configuring the smbconf File
Configuring the [global] Section
Configuring a Shared Resource
Removing Unnecessary Shares
Configuring SELinux for Samba
Creating a Samba User
Testing the smbconf File
Starting the Samba and NetBIOS Name Services
Accessing Samba Shares
Accessing Windows Shares
Setting Up a Web Server
Requirements for Configuring a Web Server
Installing the Apache Web Server Packages
Configuring the Firewall
Port Forwarding
Starting the Apache Web Server
Testing the Web Server
Configuring the Apache Web Server for Your Domain
The Basics of a Secure Web Site
Configuring Apache for HTTPS
Obtaining an SSL Certificate
Adding a New Disk to a Volume Group and Logical Volume
An Overview of Logical Volume Management (LVM)
Volume Group (VG)
Physical Volume (PV)
Logical Volume (LV)
Physical Extent (PE)
Logical Extent (LE)
Getting Information about Logical Volumes
Adding Additional Space to a Volume Group from the Command-Line
Adding Additional Space to a Volume Group using Cockpit
Adding and Managing Swap Space
What is Swap Space?
Recommended Swap Space for RHEL
Identifying Current Swap Space Usage
Adding a Swap File to a System
Adding Swap as a Partition
Adding Space to a LVM Swap Volume
Adding Swap Space to the Volume Group
Installing KVM Virtualization on RHEL 8
An Overview of KVM
KVM Hardware Requirements
Preparing RHEL 8 for KVM Virtualization
Verifying the KVM Installation
Creating KVM Virtual Machines using Cockpit
Installing the Cockpit Virtual Machines Module
Creating a Virtual Machine in Cockpit
Starting the Installation
Working with Containers on RHEL 8
Installing the Container Tools
Container Catalogs, Repositories and Registries
Logging in to the Red Hat Container Registry
Pulling a Container Image
Running the Image in a Container
Managing a Container
Saving a Container to an Image
Removing an Image from Local Storage
Removing Containers
Building a Container with Buildah
Building a Container from Scratch
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